Improvement in gas-governors



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` lUNITED STATES PATENT OEEIcEo DAVID B. PEEBLES, OF EDINBURGH, SCOTLAND.

IMPROVEMENT IN GAs-GovERNoRs.

Specification forming part of Letters Patent No. 172,163, dated January 1l, 1876; application led October 8, 1875.

- To all whom it may concern Be it known that I, DAVID BRUCE PEE- B'LES, of Edinburgh, Scotland, have invented a new and Improved Gas-Governor, of which the following is a specification:

This invention relates to improvements Vin governors used for regulating the pressure of 4the projecting part of the case. In the lower half a recess is made to receive a disk of sheet-tin or other suitable metal not acted on by gas. In thev center of this disk a hole is made, into which the conical point of a regulating-screw is placed, so lthat by moving it thehole can he opened or closed. The top of lthe screw issurrounded by a bead or feather, forming a recess, into which wax or fusible metal can be run to ieceivea stamp for a seal.

The valve, made of block-tin or a suitable fusible alloy, is of a double conical shape, with a stem at one end. The other end rests in afstep made in the head o'f the center screw, which keeps the metal disks to the diaphragm.

The bottom of the burner-tube acts as a. valve-seat, and by this arrangement the valve can be taken out for cleaning by nnscrewing sponding parts.

A is the lower part, and B the upper part, which are bolted together on the line m with a flexible diaphragm, G, between them, to be used'for raising and lowering the valves. The gas enters below the diaphragm through pipe E, and the passage F to ithe upper side of the diaphragm is located in the lateral ex,- l

tension G of the4 case. The object of this is to admit of using the regulating-screw H, in

combination with the perforated disk F, so that the volume of gas may be varied at will. From the extension G the gas passes through I into the upper part of the governor, from which it escapes by the valve D, which, like its corresponding valve in the wet governor, rises up and lessens the iow to 'the burner, when, by reason of greater pressure below the diaphragm, a greater volume passes through passage F, the diaphragm being raised Whenever the pressure increases, and when the pressure falls, so that a lesser volume passes at F, the diaphragm falls, and affords a freer exit at the valve D. Thisvalve lD is set detachably in a little step, J, on the top of the diaphragm, and itis kept in ,position by its stem extending up into the exit-tube, so that by' taking off the tube K, and inverting the governor, the valve can be taken out at any i time to remove the matters collecting on it,

or for any desired purpose, without having to open the governor. L is the bead or flange surrounding the top of the screw, for holding a wax or other seal.

The inlet-pressure of the gas, acting on the lower surface of the diaphragm, tends to raise it and close the valve; but, as it gets through the regulating-hole, pressure is established on the upper as well as the lower surface of the diaphragm, and the equilibrium is only disturbed by the weight of the diaphragm and valve, which, being constant, establishes, in conjunction with the regulating-hole, an unvarying volumetric discharge of gas. The apparatus is therefore a volume-regulator-not a pressure-regulator.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. The gas-passage F, located in an extension, G, outside ot' the flexible diaphragm, and provided with a regulating-plug, substantially as specilied.

2,. The valve D, detacbably supported on and in combination with the diaphragm, and having its stem extended into the exit-tube, substantially as specified.

3. The combination of the bead or flange L with t'ne adjusting-screw, to contain a seal, substantially as specied.

D. BRUCE PEEBLES.

Witnesses:

T. B. MosHER, ALEX. F. ROBERTS. 

